. >> we go to air force one in maryland, with president obama and the first lady just boarding on the way to south africa to pay tribute this week to nelson mandela with other world leaders >> gas prices have got up three cents a gallon according to the new survey putting the national average for a gallon of regular at $3.29, nearly ten cents less than a yearing a at this time. california above average price rose four cents to $3.5 a gallon and the cheapest gas in the lower 48 is in tulsa, oklahoma, where drivers pay $2.84 a gallon and the most expensive gas is not in the bay area but in los angeles, $3.61. >> butterflies are the latest political target in san francisco, the commission on the environment approved a resolution urging the toy been releasing but the for flies at weddings saying they are animals to be respected and should not be used add decorations. mop arcs are the most sought after for ceremonies. supporters are concerned the butterflies could damage native species. >> a start-up is looking to invent the incredible edible egg without the "egg." the san francisco start-